Mechanical roasting-furnace.



v R. VONV ZELEWS'KI.

MECHANICAL BOASTING IUBNAGE. PPLIUATION FILED JUNE 15, 190s.

91' 5 ,.531 Patented Mar. 16, l1909.

ofney.

unirsi) sfrn'rns ROMAN VON ZELEWSKI, OF ENGIS, BELGIUM.

MECHANICAL ROASTIQl'G-FURNACE.

Application filed .Tune 15, 1908.

T o all whom it may concern.'

Be it known that I, ROMAN vonT Zn- Lnwsrrr, residing at Engis, in theKingdom of Belgium, have invented certain new and usei'ul Improvementsin Mechanical Tiloasting- Furnaces; and l do hereby declare theVlolllowing to be a full, clear, and exact description oi' theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My present invention relates to mechanical roasting-furnaces andparticularly to that class thereof which is equipped with two devicesarranged independently ol each other i'or stirring and transporting theore, in order to regulate the pre-roasting in the chargechainber and thefinish-roasting in the endor discharge-chamber independently of eachother. Notwithstanding the fact that this arrangement oi said devicespermits the transformation of existing roasting-furnaces of the olderhind into roasting-furnaces, wherein the pre-ro asting as well as theiinishroasting can he regulated at will, it does not suflice to carry onthe pre-roasting without any interruptions.

The object oil my present invention now is to construct newroasting-furnaces in such a manner, that a continuous pre-roasting ol'the ores can taire place. To this end devices i'or stirring andtransporting the ores are not only arranged in the charge-chamber aswell as in the endor discharge-chamber oi' the i'urnace independently7of cach other, hut also the endor discharge-chamber is divided into aplurality oi finish-roasting-chamhers arranged independently oil eachother. ln doing so it is not only 4made possible to uninterruptedl yoperate the charge-chamber, lout also to operate simultaneouslytherewith the finish-roasting-chainhers thus l'orined. The advantagesgained lhy thus transforming the endor discharge-chamber into two ormore finish-roasting-chainhers consist in a considerable saving oi timeand in a higher working capacity ol' the roasting furnace. Besides thisa more advantageous, uniform, and speedy pre-roasting is obtained thanhitherto it has been possible, because the heating oi the charge-chamberaccomplished by the gases developed during the finish-roasting in theiinish-roasting-chamhers is never interrupted, since there is always oneor more of the iinisl'i-roasting-chambers in full opera- Specicaton ofLett-ers Patent.

Patented March 16, 1909.

Serial No. Z138,597.

tion. By this arrangement it is not necessary to interrupt the heatingprocess in the charge-chamber each time a new charge o'l` pre-roastedore is introduced into one or the other oi' thei'inish-roasting-chamhers, as it is the case in the existingroasting-furnaces, provided with but one iinish-roasting-chamber, sothat by this means an additional increase of the working capacity 0i theroasting-furnace is secured.

ln the accompanying drawing a verticalsectional view ol' my improvedmechanical roasting-furnace shown.

The lower part ci' the body 1 olI my irnproved mechanicalroasting-furnace is here divided into the two finish-roasting-chamhers 2and 3, which number might, however, be increased ii so desired. These'finishroastinLchainhers are connected hy means or" the channels Li and5 to the multistoried charge-chamber G and the floor of each ol' saidfinish-roasting-chamhers is provided with a number olA heating-ihres 7.The charge-chamber 6 is here shown to consist ol the threesuperimposedstories 8, 9 and 1U, the number oi' which may oi' course he varied tosuit any given conditions. The rotatable stirring andA transportingdevice 11 of the charge-chamber 6 consists ol the vertical shai't 12 andthe three sets oi rahbles 13, 14 and 15 `which are equipped with theusual hlades or teeth 16 which are roof-shaped on the one side andprovided `with oblique faces on the opposite side, for only stirring theore when rota-ted in one direction and transporting the Ore when rotatedin the opposite direction, as customary.

To discharge the ore from the several stories oi the charge-chamber 6the oblique faces oi the teeth 1G ci the sets oi rahbles 13 and 15 arearranged to move the ore toward the circumference oi the stories S and1), since the discharge openings 1'? oi the licor 13 and thedischarge-openings 19 of the iioor 2() are located in proximity ci theannular wall or the charge-chamber, whereas the oblique faces of theblades or teeth 16 of the set of rahloles 14 are arranged in a directionopposite to that oi the oblique laces of teeth 16 iol the other two setsci rabhlcs, since the dischargeopening 21 of the intermediate iloor22'is located at the center of the latter. The discharge-openings 19 oi"the floor 2O are provided with slides 23 for a purpose to be more fullyexplained later on. Rotation is imparted to the shalt 12 by means of theelectro-motor 24, )laced in the vai-alt 25 beneath the charge-chamber 6.The shaft 12 is suitably journaled in the iioor 18 and in the crown 26of the vault 25 by means of the bearings 27 and 28 resifieeti e y.

ln the iinisheroasting-chanibers -2 a stirring and transporting device29 is arranged which consists of a vertical shalt 30, journaled in astep-bearing 31 and the bearing 32, and the set of rabbles 33 the bladesor teeth 34 of which are roolshaped on the one side and provided withoblique faces on the opposite side, as customary. Beneath the iioor 35of the iinish-roasting--chamber 2 the shai't 30 of the stirring andtransporting device 29 carries a bevel-Wheel S6 which meshes with asimilar wheel 37 secured to a horizontal shaft 3 The latter is journaledin the bearings 3Q and t0 and is lilie the vertical shaft 12 driven byan electromotor 41. 1n a siniilar manner the iinish-roasting-chamber 3is provided with a stirring and transporting device 12, which consistsof the shalt d3, journaled in the step-bearing i4 and the bearing L15,and the set of rabbles t6 the blades or teeth i7 of which areroot-shaped on the one side and provided with oblique faces on theopposite side. Below the floor 48 of this iinish-roastma-chamber theshaft d3 carries a bevel-wheelL Li9 which meshes with a similar wheel 50seated on the horizontal shaft 51 which is iournaled in the bearings 52and 53 and driven by the electroinotor 54.

1t is evident that instead of the electroinotors 24, i1 and 5a otherdriving-means might be employed to rotate the stirring and transportingdevice 11 of the charge chamber (i and the stirring and transportingdevices 29 and i2 of the finish-roastingchainbers 2 and 3 independentlyof each other and in opposite directions, or to set them at rest atwill.

The improved mechanical. roastingd'arnace operates as follows: rlhe oreto be roasted is intro duced into the charge-chamber 6 through thefeed-hopper 55 into the upper story 8 of the charge-chamber 6 and thendistributed over the floors 18, 2O anil 22, whereupon the hopper-slide56 is closed. As at every moment at least one of thefinish-roastingchambers 2 and 3 is in full onerzition, the newlyintroduced ore is brought a t once into contact with the heat and gasesemanating from the operated iinish-roasting-chanibei'. Afterdistributing the ore the direction of motion of the rabbles 13, 142 and15 is reversed to stir the ores until they have been sutlicientlypreroasted. Supposing now, that the finish-roasting-chaniber 2 is stillin operation and that the i'inish roastingchamber 3 has been put in acondition for the reception of a new charge oll prea'oasted ore,

eraser the slide adjacent to the upper end of the channel i which untilnow was open will be closed and the slide 23 adjacent to the upper endolf the channel 5 opened, as shown. Yi."ilhen now the stirring andtransportingl device 11 is rotated to discharge the preroasted ore fromthe charge-chamber G it will pass through the openings 17, 21 and 19into the channel 5 and hence into the iinishroasting-chamber 3. Baringthis time the operation of the iinish-roasting chamber 2 need not beinterrupted as the heat and gases emanating tl'ierefroni can escape byway of the circular space 57 through the opening 19 used for thedischarge of the pre-roasted ore into the channel 5.

fis soon as the pre-roasted ore has been discharged, new ore isintroduced again into the charge-chamber 6, distributed on the severalfloors 18, 22, 2O and preroasted, as described before. ln the meantimethe iinishroasting of the pre-roasted ore in the iinishroasting-chamber2 has been accomplished and the ore is discharged from this chamber inthe well known manner, during which time the door 58 is held open bymeans of a weighted latch Before doing so, the slide 23 adjacent to theupper end of the channel 4l has been closed to compel on the one handthe heat and gases emanating troni the iinishroasting-chamber 3 now infull operation to pass directly from the channel 5 through the opening19 nearest to it into the charge-chamber 6, and to prevent on the otherhand that any ore drops unnecessarily through the other opening 19.

As soon as the last charge of ore contained in the charge-chamber 6 hasbeen pre-roasted to the ccsired degree it is discharged into theiinish-roasting-cl iniber 2 and then the charge chamber 6 is chargedagain with fresh ore. when during this time the preroasted ore has beenfinish-roasted in the finish-roasting-chainber 3 it is dischz'u'gedthrough the door 60 held open during this operation hy the .ifeightedlatch 61. The gases and other products of combustion wiich leave thecharge-chamber 6 are led into the air by means of the chimney 62.

From the foregoing it will be seen, that by means of niy improvedmechanical roastingfurnace the ore can be pre-roasted to any desiredLdegree independently of the` finishroasting-chainbers 2 and 3, and theiinishroasting in the latter carried on independently of thecharge-chan1ber t3. lt is thus made possible to not only carry on thepreroasting of the ore without interrui'itions, but also to regulate thepre-roasting to suit any kind of ores and without being influencedthereby in any manner by the :finish-roasting operations.

instead of the two tinish-roasting-chainbers shown in the accompanyingdrawing any number of them might be arranged as coi'iveniently can begrouped around the lower part of the roasting-furnace.

I claim l. A mechanical roasting-furnace of the class describedcomprising, a furnace-body, a charge-chamber in said furnace-body forpreroasting the ore, and a plurality of finishroasting-chambers forfinish-roasting the preroasted ore arranged independently of each otherand communicating with said chargechamber.

2. A mechanical roasting-fiunace oi the class described comprising, afurnace-body, a charge-chamber, a stirring and transporting devicemounted therein, a plurality of iinishroasting-chambers arrangedindependently of each other and communicating with said charge-chamber,and a stirring and transporting device mounted in each ot saidfinish-roasting-chambers.

3. A mechanical roasting-furnace of the class described comprising, afurnace-body, a charge-chamber arranged therein, a rotary stirring andtransporting device mounted in said charge-chamber, means for operatingsaid stirring and transporting device, a plurality olvlinish-rofisting-chambers arranged upon the outside of saidfurnace-body and communicating with the interior of said charge-chamber,a rotary stirring and transporting device in each of saidfinish-roastingchainbers, and driving-means for each of said stirringand transporting devices mounted in said iinish-roasting chambers.

4. A mechanical roasting-furnace of the class described comprising, afurnace-body, a multistoried charge-chamber arranged therein, a stirringand transporting device mounted in said charge-chamber and operatingwith a set of rabbles in each of said stories, means for rotating saidstirring and transporting device in either direction and for setting itat rest at will, a plurality of finishroasting-chambers arranged.independently of each other and. jointly communicating with saidcharge-chamber, a rotary stirring and transporting device in each oisaid 'linish-roasting-chambers, and driving means for each of saidstirring and transporting devices mounted in saidlinish-roasting-chambers.

5. A mechanical roasting-furnace of the class described, comprising, afurnace-body, a charge-chamber, a rotary stirring and transportingdevice mounted therein, means for operating said stirring andtransporting device, a plurality of finish-roasting-chambers arrangedupon the outside of said furnacebody, channels connecting the crowns ofsaid 'linish-roastingchambers with said charge-chamber, a recessed Zoneof said furnace-body forming a communication between said channels belowsaid charge-chainber, a stirring and trans orting device in each of said'linish-roasting-c ambers, and drivingmeans for each of said stirringand transporting devices mounted in said :finish-reas ting-chambers forrotating said stirring and transporting devices in either direction andfor setting them at rest at will.

6. l'n a mechanical roasting-furnace of the class described, afurnace-body, a multistoried charge-chamber arranged in the upper partoi said furnace-body, a plurality of iioors arranged within saidcharge-chamber and provided with discharge openings, slides for closingand opening the dischargeopenings of the bottom-floor of saidchargechamber, a hopper for introducing the raw ore into the top-storyof said charge-chamber, a rotatable stirring andtrans orting devicemounted in said charge-cham er, means for rotating said stirring andtransporting device in either direction and for setting it at rest atwill, sets of rabbles carried by said stirring and transportingdeviceand operating in the several stories of said chargechamber, andmeans for leading off the products of combustion leaving saidchargechamber.

7. In a mechanical roasting-furnace ol the class described. afurnace-body, a chargechamber, a plurality of nish-roasting-chambers,channels connecting said iinish-roasting-chambers with saidcharge-chamber, a recessed Zone in said furnace-body forming acommunication between said channels below said charge-chamber, a iloor)rovided with heating-lines in each of said 'irish-roastingchambers, adischarge-door in each of said iinish-roasting-chambers, a weightedlatch for each of said discharge-doors, a rotatable stirring andtransporting device mounted in each of said iinish-roasting-chambers,and means for each of said stirring and transporting devices forrotating them independently of each other in either direction and forputting them at rest at will.

8. ln a mechanical roasting-furnace of the class described thecombination oi a furnacebody with a charge-chamber, superimposed 'floorsin said charge-chamber having discharge-openings vertically arranged ina staggered relation to each other, slides for shutting and opening thedischarge openings of the bottom-'floor at will, a hopper for admittingraw ore, rabbles for stirring and transporting the ore on said floors,means for rotating said rabbles simultaneously in either direction andfor setting them simultaneously at rest at will, a chimney for leadingoii the aroducts of combustion escaping from said charge-chamber, aplurality of iinish ro asting chambers arranged independently of eachother around the base of said furnace-body, channels connecting thecrowns of said finish-roasting-chambers with the slide-operated openingsof the bottomiloor of said charge chamber, a recessed Zone in saidfurnace-body forming a communicaeither direction and for setting them atrest at will.

in testimony whereof I have sighed my llame to this specification invthe presence of two subscribing witnesses ROMAN VGN ZELEVJSK.

Witiiesses H. A. JOHNSON,

PENDLETON CRUGER.

tion between said channels below said chargeehamber, a ioor providedwith heating-ihres in each of seid iiiiish-ro@sting-chambers, :tdischarge-door for each oi" said iilish-roast- 5 i11g-ohambers, aweighted latch for each of said discharge-doors, a rotatable stirringIand transporting device mounted in each of said finish roastingChambers, and means for rotating each of said stirring and transport- 10ing devices independently of each other in

